Vent plug



Dec. 19, 1933.

H. E. MCCRERY ET AL VENT PLUG Original Filed Aug. 13, 1930 Ma If n M E wm 445/5975 JmEA? wwm -- epenin s' 27. operat en obviouslyj will berevers d contraction of the material, thus for i the shipment of speciallacquer compounds Theoperationof the device is as follows:

Assuming that the drum is to be filled with mo- 24 may be inserted inoperative position either before or after the application of the plug 14aswill be apparent, The recess 161is of substan -tial size and" forms anexpansion chamber when t the temperature of the molasses rises. 1Obviously the drum isnot completely filled with the molaschamber 16,forms an ample expansion space-for themolasses. When suchekpaiisiontakes iece, 5

, air will be expelled upwardlythroughtheopening 21, through the fabric22, and thus to the atmospherethrough the chamber 26 and vent permittinair {to flow into {the drum and prevent'the creation 'oia parallelvacuunitherein; In practice, the drum preferably vis provided with enehftheuevi'ces ill the headof the drum 7 :and in the side, and whenthe-drum stands on end," theescapecr air 'takesblal" through the vent'pmg in-the head or the drum; It has been fouhdithat no escape of the.liquid will take place threughth vent plug j int the sit e'efjt e rdrum,sincejsuch escape-is prevented by the vi's- Sher without the escaee: material ,thei'efrorri, -main plug threaded in one wall ofthecontainer cosity er the molasses. when theurum 'sta'nds l enit siu te side vent is rolled to th'e'top of the terpermit; the e cape 'of rupon the expansion qf; the mola ses and the escape of the.

molasses through t e vent plug in the head. will be jprevfnted by theviscosity of the material which" prevents it Item sowing through to}screening element. Thusit will be 'apparent that the drum readilyjmalybe handled in any manbut xpansion hhd eehtraetien of t e material druminmeithe'r hf fthe 'hdrriial pesitions re- As previously'stated, t efabric aisks'zz may be thibf dberidihg "upon the nature" or the terialin the Eitherploth or. wire fabric,

ho ver, will notiseal the; drum to the atmosphere, anaysuehseeungis'i'mport'ant when' the t e'ontainer is em loyed forshipping materialssuch as lacquers whichfoxidize readily in thepresence jfifo'ri thereason "stated, the form of the device illustratdin Figure 335 preferredwhen the container is u sed for shipping lacquersfand other-"o'xldizable materials. The mbber 'dis '28 i pierced'in a number ofplaces wit-ha needle-like instrument, and "each opening 29 closes uponthe withdrawal ofthe instrumentreferred to.

cas -thermal conditions therefore, material in atdr inrifprovided withthe form of the device shownin l 'igure 3 will'be :sealed from theaction o'f the atmosphere; Upon theexpansion of the material, however,pressure will be created in lwardly toperniitair to escape throughtheopenings 29. V

It be appatent that device extremely simple in construction andgoperation. and does not requirethe provision offvalves orother means thedrum which willfiex the rubber disk up for preventing the escape of thematerial in the drum. In practiceit has been found thatthe device iseflicient for permitting the expansion 'in the drum are subject tothevaporization of one ormore of their constituents, and the chainbars 16and 26 form condensation chambers for the vapors arising from thematerial in the drum.

In this connection it will be noted that the mav ijterials tend to draindownwardly along the sides ses,and the'small air space between thesurfacebfl the molasses and the head 12,together with'theof zthechamben'25, thus preventing the ven openings 2'? from becoming clogged.

Aspr-eviously stated, the device is particularly adapted for use withmetal shipping drums, al-

'.though it obviouslyis not limited to such applica- "tion but may beused with shipping containers of other kinds. -It will be noted that thevent openings 2'7 *o'fthe' auxiliary" plug assoeiatewith the head of.the drum are arranged above the upper limit of the seam 11. "Asprevieuly stated,

water sometimes' collects"onthe headjof" the'drum, and the; arrangementof the vent openings 2'7 above the seam llfprevents waterffrom-drainlngtaken as preferred examplesof the same and that various changes in theshapes, S eena arrange mentiof parts may be resortedto withoutjdeparting from the spiritxof theinventionor th Scope orthe sub joined-cla ims.

* Wecla'im: V li'The combination "witha container, 'oi a and dividedintermediate "its up er. andflower ends byfan integral wall,'said'mainplugfbemg m provided'in its upper and lower faces with relativelvlarge' recesses ithe lower of which com- 'municates with theinteriorof the container, said wall having "a relatively small openingtherethrough, 'a member arranged in said upper recess 25 tainer u q theexpansion and contractionpf the v materialin the container, and'anauiriliary plug threaded in said upper recess jand operative forretaining said member in position, said auxiliary 'plii'g heing'providedin its lower en'dwith a relatively large dome shaped internalrecessop'en to 185 said member, said auxiliary plug being further"provided with radial .vent openings communicating with said internalrecess substantially atthe topthereof/ 2 A vent deviceforcontainerscomprising 'a @MO mainplug threaded forieceptionin' an opening in onewall of the container and providedwith an integral wallintermediateits'upper andf-lo'we'r fends isaid main plug being providedewens, v below said :wall with relatively largef'recesses the latter ofwhiohi co'mmunic'ates with the interior oiithe' contaiherpsaid wallhaving a" relatively sm v n h re hr h; m mber mens s insaidupper'frece'ss against sai'd wall and'havi'ng openings"therethr'ough -sufficiently small 'to pre i J the containr' but adaptdtopennjt the pdsshse position, saidauxin plug lbeinsi p f vid eqfin its,a I,

of air to and from the container, upon" the; expension and contractionot the-material therein, and an'aux illarypluglthregded in said upperiejce'ss und"= operative for retaining said member ,in

iliary plug beingiurther provided with a plurality of radialventopenings communicating with said internal: recess substantiallyat'the'top thereof.

HAROLD McCRERY.

ALBERT usn ll I

